AMT-70/AMT-73/AMT-75 Installation and Operation
11.3 Messages
The following are console messages generated when the redundancy system is enabled.
N.B. ‘This unit’ refers to the console you are interfacing with. ‘Other unit’ refers to the other unit in the
redundancy system.
“REDUNDANT unit fault”
This unit is ACTIVE and has monitored the other unit as in a fault state. This message will appear
when this unit first senses the condition or condition change on the other unit.
“Switch fault
(possible short)”
The redundancy cable is not connected properly, has a fault (most likely a short between the position
sensing inputs), or another cable with different functionality is connected. Power off the unit and check
the cabling.
“Switch unreadable
(possible disconnect)”
Usually appears when the cable is disconnected, but could appear because of a bad cable. Check
cable wiring.
“System in unknown state”
This message should not appear in almost any circumstance. This may indicate redundancy software
failure.
“REDUNDANT unit ready”
This unit is ACTIVE and has monitored the other unit as in a ready (Good) state. This message will
appear when this unit first senses the condition or condition change on the other unit.
“ACTIVE unit fault”
This unit is REDUNDANT and has monitored the other unit as in a fault state. This is the RF path
switching condition. Provided this unit is in a Good state, the RF switch is driven to the ACTIVE role for
this unit. The other unit becomes the REDUNDANT unit.
“BOTH units fault”
This unit and the other unit have both been monitored as in a fault state.
“Unit now ACTIVE”
This message can appear either when the unit powers up with redundancy enabled, or after a Wire-
harness reconnect to this unit. This indicates this unit is the ACTIVE (on-line) unit.
“This unit REDUNDANT”
This message can appear either when the unit powers up with redundancy enabled, or after a Wire-
harness reconnect to this unit. This indicates this unit is the REDUNDANT (off-line) unit.
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